Millennium Park in Chicago is an enormous green roof

Jim Reilly visited Millennium Park in Chicago tonight.  Known for its Cloud Gate sculpture (aka the Bean) and its arch-covered Great Lawn, the park is less famous for the fact that it is itself an enormous green roof.  Beneath its trees, shrubs, native plants (in the Lurie Garden), and sweeping lawns is a gigantic parking garage, restrooms, offices, and more.  A brilliant use of space in a crowded environment - or any environment.  Across the highway is Maggie Daly Park, currently under construction, which will also sit atop a parking garage.  Its six to seven HUNDRED THOUSAND square feet of green space will make it one of the largest green roofs in the world.  Check it out:

http://youtu.be/x47ZU2zzXiU